1999 fused phenylcycloalkyl derivatives

fused phenylcycloalkyl derivatives (rings with 3, 4, 7 or more members)Q 1040

22 - 102Intramolecular Diels–Alder Reactions. Part 5. Facile Synthesis ofan Octahydrobenzocycloheptenone Derivative Utilizing Intramolec-ular Diels–Alder Reaction. — Intramolecular Diels–Alder reaction ofundecatrienone (IV), readily prepared from siloxycyclopropane (I), provides amixture of diastereomeric octahydrobenzocycloheptenone derivatives (V)-(VIII)in ratios depending on the reaction conditions employed. High diastereoselectionfavoring the endo-product (V) is achieved using TiCl4 as promoter. — (FREY,BARBARA; REISSIG, HANS-ULRICH; J. Prakt. Chem. 341 (1999) 2, 173-178;Inst. Org. Chem., TU Dresden, D-01062 Dresden, Germany; EN)

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